Coffee machine



FIG. 1 is a perspective left side front elevational view of a coffee machine showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective front elevational view of a second embodiment of a coffee machine showing my new design;

FIG. 9 is a left side elevational view of FIG. 8, all other sides being the same as the first embodiment (except FIG. 3);

FIG. 10 is a perspective front elevational view showing a third embodiment of my design; and,

FIG. 11 is a left side elevational view of FIG. 10, all other sides being the same as the first embodiment (except FIG. 3). 

The ornamental design for a coffee machine, as shown and described. 